Pontoon boat



FIG. 1 is a perspective view of a pontoon boat showing my new design;

FIG. 2 is a side elevational view thereof; the other side being a mirror image thereof;

FIG. 3 is an top plan view thereof;

FIG. 4 is a front end elevational view thereof;

FIG. 5 is a rear end elevational view thereof; and,

FIG. 6 is a bottom plan view there.

The broken line showing of the guard rail, in FIG. 1, is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a pontoon boat, as shown and described. 